Workholder



Mardi 24, 1925. 1,530,795"

s. J. -TELLER /f WORKHOLDER Fild Oct. 8, 1921 Patented Mar. 24,V 1925.

UNITED STATES PATENT-orifice.

SPENCER JAY TELLER, 0F HARTFORD, CNNECTICUT, ASSIGLNOR T0 PRATT da WHIT-NEY COMPANY, v OE NEWVYOBK, N. Y., A CORPORATION OF NEW JERSEY.

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Application filed October 8, 41921. Serial No.

To ZZ whom it may concern.'

Be it known that I, SPENCER JAY TELLER,

a citizen of the UnitedStates, and resident of Hartford, in the countyof Hartford and titate of IConnecticut, have invented cerlain new anduseful Improvements 1n VV-orltholders, of which the following is aspeci-` iication. i I

This invention relates to work supports and particularly to a vise forcentering and holding a piece of work to be operated,

hywork pieces may be dropped therein from above, the closing of the visethereafter being adapted to automatically center the worlron a fixedaxis and secure the saine in position for the tooling operation, theworl:

piece always being centered on the samey fixed axis whatever he the sizeof such piece.

A further object of the invention is to provide a vise particularlyadapted for use in a center drilling machine, such vise comprising apair of work engaging ljaws mounted to slide in relatively angular guideways, oneof such-jaws being provided with work supporting means and theguideways being so arranged that during the operaiive movement of theliaws, the work is engaged at three equi-distant points by 'the jaws andwork support which in ythe centering operation move simultaneously andequally toward the said fixed axis in a manner to always automaticallycenter and hold work piecesof varying diameters with their Central axesin alignment with-the drilling tools whereby the same may be accurately'drilled upon their end faces.

With the above and other objects in viewj my invention consists 1n thefeatures of construction and operation set forth in the fol-v V -lowingspecication and illustrated in the accompanying drawing.` In such'drawing i annexed hereto and forming a. part of this seein.

specificatioin' I Yhave shown my invention l as applied to a centerdrilling machine but it will be understood' that the invention can beotherwiseembodied and that the draw' ing isv not to be Vconstrued asde'ningyor limiting thev scope of" the inventiomlthe claimsrappended tothis specification being relied upon for that purpose. i

Referringl to the frVv Figure l is a plan view of a center drill ingmachine having my invention applied thereto. i i

Fig. 2 is an enlarged'plan view of one of the work` centering andclamping vises partially in section. 'y l Fig. 3 is an end elevationthereof partially in section.

Fig. 4l is arear sideelevationof the vise.

'Fig 5 is aV detail cross section on line Y 5-5 of Fig; 3. y y

Fig. 6 is a diagrammatic end elevation of a modified form of theinvention.

In center drilling .andE other machines wherein the work must beaccurately centered `and then held secured relative to a tool or tools,it is quite essential that the work centering and securing means shouldbeY such `that work, pieces of varying sizesA maybe readily insertedthereinto and accurately centered and secured. Y The present inventionprovides such a mechanism including a pair of'worlrengaging jaws open atthe top forV unobstruotedly receiving a piece of work. llfleansarefurther provided eures of the 'drawing in connection with vthe awsfor automaticahf ly centering and securing work pieces in the sameposition relative to the tool even though such work pieces vary widelyiny size. The specific mechanism shown in the drawing and illustrativelof my invention will now be described.

In Fig. l of the drawing, my invention spindle G, each supportinga drill7 and adapted to be rotated by a motor 6a. Means comprising a pair ofconnected cranks operated by a handle 8a is provided for feeding thespindles longitudinally. rlhe Work centeringl andv securing mechanismlVways preferably being.` arranged at'kright angle-s to each other asshown Vin Fig. S. lVo'rk centering and holding jaws 14: and

Vi are slidablyinountedin the guide ways.

A shoeV 16' secured by screws 17 is provided on each guide'way' wherebythe jaws may be properly iitted in the gui'deways. Y

lThe jaw 14 comprises the work engaging jawproper lS'secured to a slide19 by means of a'Y clamping bolt 20. A bar 2l which serves as a work.support is secured to the jav'vjl between the jaw' proper i8 and slidel9`b'y' ine'ans of pins 22'and ,said clamping bolt 20. This bar extends:roin jaw'li toV within the jaw 15 wherein raclr teeth 23 in the. bar areengaged by a pinion 2li mounted in jaw l5. This pinion is preferablyei;- tended' to form aV sleeve The longitudinal opening' through thesleeve 25 is cyl-indrical in form and the hexagonal oper ting `shait 26`extends loosely therethrough.V The pinion is held in position in thejawl by means ofx a bushing 27; A bushing` 28'is adju's'tably 'secured'to the opposite end ot the pinion sleeve 25 by means ot'a clampingbolt'29. yThis bushing' operatively engages the 'operatingshatt-26wli'icli as before stated is Vprete'rably othexagonal' torni incross section. j A handle' 30`is'adjustably secured 1 totlie`bii'sliingf28' byv means ofv a clamping.

bolt V3lJ whereby to rotate the lshaft'. As shown in` Figl,this"shaitextends to the other'vise wherein it operatively engages a like' pinionfor' operat'ing'the jaws of s'uch vise. l l Y Fre''qiu'ently,v it may bedesired to operate on work wherein the portions thereof engagedI by`the" tivo" vises 9 are ot diiiere'nt' diameters.' lnsuch case,' 'it' isessential Vthat the jaws oi one vise be adjusted to a relatively',closer position than the' jaws of' the other' vise. The bushing 28 inconnection with the' cooperating' mechanism' therewith is' adapted toperform thisV function'. By loosening'the clamping screw 29, the bushingmaybe r'otat'ably'adjusted'on the sleev Y 25V an'dpinion' 24e. Suchtineiit rotates the shaft 2S relative tothe pinion where bythe jaws of'one viserare relativ ly adjusted independently of the jaws ot theotli'er'vise.A It' should further be notedvthat the handle is rotatably'adjustable on the arranged'at right? angles to eachother and eachsuideway'is'inclined 450- to the vertical line :-y. In operation,` theslides move along lines zr-Z) directly toward a common axis or.centerb'. It' will furthermore bel noted that, as illustrated, the workengaging' surfaces ot thev jaws andV 32are' vertical and the worksupporting surfaceoi' the'bar' 2l is horizontal. The line z5-Z),parallel with the line ot" movement oi each jaw and passing through theintersection of the ver'- tic'al and horizontal work'engaging'surfaces,bise'cts the anglforniedfhy thesaid'vertical 'and horizontal workengaging surfaces inV The perpendicular distance beV each slide.` tweensuch surfaceson each' slide" and the point l), which point' is inthesaidv bise'ctor line', are always e'cuial Forothis reasoin the workpiece' 'is accurately centered onl the axis o whateverpbe the diameterof' such piece.

In operatiom thejaws 18 ai'id132and the. work supporting bar" alivaysmove through' equall horizontal' and vertical disi tances respectivelytowardthe center 12'; The vise is` therefore"adaptedtoaccurately centerwork pieces of varying'-` sizes; as sliown'parneulariy in Fig; 3,uieeentei-"otsuch pieces bei ng always at' the' 'ii'xedand' common axis7). In Fig. 3,v the jaws 18' an'cl'32'-a`iid the supyThisconstructionalso permits oi' the initial adjusti'nent of the' portingfbar2lare'sliow'n in dot and dash the center'o'f' s'uclinvorkX piecelieing atthe point! Zi coincident with the* center of .the larger'piece WV;

lnoperation',Y a work-fy piece may' be dropped directly into the ,jawsfrom" above. The handle 3'() may tlieu'be' raised2 to rotate the'shait26 and close trh'e'jaivs In thisop-l eratiom tliew'vo'r'lr1 pieceisengag'edJ at'v three spaced points by' 'three' parts (18,21 and 32)- allequally movable" towards the ii'r'edv axis b" whereby the piece" isaccurately' cen-A to 5' of the drawing', as above described5 illustratesthe preferred form of my invention, it should be clearly understood thatthe same may be embodied in other forms if desired. F ig. 6 of thedrawing isillustrative of another suchform of the invention. n

such figure, 40 indicates the base of a vise indicated in Fig. 6 ascentered on the fixed axis d between the work engaging jaws 41 and 42.Each slide is provided with a work engaging jaw 42 which comprises twoobliquely' extending work engaging surfaces 43. It will be noted thatthe angle e between each of these surfaces of each slide and the axialline of movement (0-d) ofV such slide through the intersection of thesaid engaging surfaces thereof are equal. By such construction the rightangular distances between each said surfaces of each jaw and the fixedaxis Z are always equal whatever be the diameter of the work. The jawsmust necessarily be constructed in accordance with these` details ifthey are to accurately center work pieces of varying diameters. It willbeynoted that the construction shown in Fig. 3 is in accordance withsuch details and that thelast said angles. in such jaws (correspondingto angles e in Fig, 6) are each 450 angles.

vlt will furthermore be noted that the upper work engaging surfaces 43of the jaws 42, while extending in a substantiallyvertical direction,are slightly inclined inwardly from. the vertical. Such inclination isadapted to not only hold the work piece within the jaws but to also holdthe same downwardly into close contact with the lower work supportingsurfaces 43 of the jaws. It will be understood that one or both jaws 18and 32 may be constructed in this manner, `if desired.

lWhat I claim is:

l. A centering and holding vise comprising the combination of twolaterally movable work engaging elements each provided with a workengaging surface extending in a generally vertical direction, worksupporting means extending beneath and between the late-rally movablesurfaces, and meansv for moving the said elements inwardly and the saidwork supporting means upwardly always simultaneously and uniformlytoward a common axis.

2. A centering and holding vise comprising the combination of a base, apair of angularly disposed guideways therein, an element slidablymounted in each guideway, work engaging means on the elements comprisingthree angularly disposed work engaging surfaces adapted in the workengaging operation of the elements to always move simultaneously anduniformly ,toward a common axis, and means-for moving the elements intheir `guideways- S. A centering and holding vise compris- Y ing thecombination of a base, a pair of angularly disposed guideways thereinconverging upwardly,` an element slidably1 mounted in each guideway,work engaging means on the elements comprising two vertically disposedwork engaging surfaces and a horizontally disposed work supportingsurface, the said surfaces being adapted in the work engaging operationVof the elements to always move simultaneously `and .uniformly toward acommon axis, and means for moving the elements in their guideways. I

4. A centering and holding vise comprising the combination of a base, apair of angularly disposed guideways therein converging upwardly, anelement slidably mounted in each guideway, work engaging means on eachelement, work supporting means secured to oneof the elements andextmiclingl beneath andk between the first mentioned work engagingsurfaces, the said surfaces and supporting means being adapted in the`work `engaging operation-of the elements to alwaysamove lsimultaneouslyand uniformly toward a common axis, and means for moving the elements intheir guideways.

5. A centering and holding vise comprising` the combination of a base, apairof an,- gularly disposed guideways therein converging upwardly, anelement slidably mounted in each guideway, work engaging means on eachelement, a work supporting bar secured to one of the elements andextending beneath and between the first mentioned work engagingsurfaces, and means on the other element operatively connected to thebar for simultaneously movingthe elements in their guideways, the saidsurfaces and bar being adapted in the work engaging operation of theelements to always move simultaneously and uniformly toward a commonaxis.

6. A centering and holding visecomprising the combination of a base, apair of angularly disposed guideways therein, a work engaging jawVmounted to slide in each guideway, a bar secured to one jaw andextending to the other jaw, such bar serving to support a piece of workplaced loosely between the jaws, rotary means on the said other jawdirectly engaging the Vbar for sliding the jaws inthe guideways. Y

V7. A centering-and holding vise comprising the combination of a` base,a pair of-` guideways formed on the top surface thereofv at an angle toeach other, a slide mounted for linear movement on each guideway, Workengaging means comprising an upwardly extending work engaging surface oneach slide,

work supporting Vmeans connected to the slides-v and'- provided With aWork'i supporting surface" eXte-nding" beneath and between thesaldiu'pwrdlyextendlng- Surfaces and atan angle-'1thereto7 theanrangeinentbeing suh' that the angle orme'dhy-'the saidrelative'lyangular? surfaces of eachslid'eis bisected by a= line passing' throughthe apexof such angle and parallel With the' line o-i' move# mentofsuch-slide in ite` gndeway, and' co operating? means for simultaneously1no .fingthe slides.

8a AAecenteringi andiholding vise comprising" ieoonbinationfof zit-base;aparrof relaiguld'efWn-ytl'ierein, avworlc` engaging: jaw lnonnte'd toslide' in' each gluideway, means on one 11W and"1 extending betweenthel` 'J aws for' sliding the jawel inf the gude'W-ays.

mountedonal horizontal Support, a' pair of relatively' right gularupwardly com-'erg ingr; gnidewayn thereon, eaclr guideway tending:fromthe vertical, aworlz engagf ing awfinounted to slide oneacligudevay,means extending;horizontally fronrone awto'thefothe'rfy andservingto-support' a piece' of wor-ln placedy loosely Ybetween the jaws,

and ineans'foperativelyf connected to Athe last mentioned means forslidingtthejaws in the f guidewaye,i the" sliding'` movement ot each jawalways` being! throughy equal vvertical and horizontal distances.

l0; A: Work centering; and holding mecha--` nism coinprisngthecombination of a pair of`r Visesyeachvise comprising' a base, a pairofrelatively angular upwardly converging gnideways thereon,y af W-orlLengaging jaw mounted to slide' on` eachs guideway, means 9:- A centeringand holding: vsecoinprie# ing the conibination'totE a hase adapte-ditohe between thejaweffor supporting a; pierce of Worlgy 'andl ine-anscon'nnon to both vises for Sliding' the' awe thereof in" their guide-Way-s in a4 manner' tO-lnovethe` lsaid Y aws and the said'Worlsupportingnieans simultanea# ously and With equal Speed-toward a=coininon axis;k v

ll?. A Work centering and holding' mecha'- nient-comprising thecombination' of a' pair ot viSes,\each'Vise comprising abase, a pair ofrelatively angular upwardly converging guldewaysr thereon,- a Workeng-aging gaw mounted: tol slide on each ffuidewav 'meansbetweenthejaws*for supporting. a piece of Work,f.1'i1ea1ns'commontovboth vases Jfor sliding' the 3 awsfthereof 1n their gnidewaye in amanner tof'lnovethe s'aidjaws and the said Work supporting: meanssimultaneously and with equalspeedtoWard'zaLconimon anis, and`- `ineensfor relatively' adjusting' the )la-Ws of jaws.; alpnlonfengagingf each.ra-ck bar, and

a shaft operatively.connected Withthe pinions: for sliding: the )nwsinthe guldeways in av inanner to'n'i'ove the said jawsv and the said barsimultaneously and-With equal speed v toward a `common axis;

In' testimony: whereofv I1 hereto aliix my sign ature. Y

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